Control circuit for use with amplifier

A control circuit for use with an amplifier comprising:

• a signal source for producing a signal;
• an amplifier circuit consisting of an input transistor which receives said signal from said signal source on its control electrode, a driving transistor with its control electrode connected to an output electrode of said input transistor, and a power amplifying transistor with its control electrode connected to an output electrode of said driving transistor;
• an output means connected to the output electrode of said power amplifying transistor;
• a switching transistor with its output electrode connected to the control electrode of said driving transistor;
• a negative feedback circuit connected between the output electrode of said power amplifying transistor and an input electrode of said switching transistor, said negative feedback circuit including a capacitor and a resistor connected in parallel with each other;
• a voltage source for applying a voltage to said amplifier circuit;
• a charging and discharging circuit connected between ground and the control electrode of said switching transistor, and
• a momentary switch means connected between said voltage source and said charging and discharging circuit such that when said switch is means momentarily closed said charging and discharging circuit charges which causes said switching transistor to conduct and supply negative feedback to said driving transistor to turn it off and when said switch opens after closing said charging and discharging circuit discharges for a period of time after which said switching transistor is turned off which turns said driving transistor on to supply power to said output means.